<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<% 
//做退出准备

//1.清空session变量的
session.setAttribute("userName",null );
//2.在线人数减少
String cournter = (String)application.getAttribute("cournter");
int count = Integer.parseInt(cournter);
	count--;
application.setAttribute("cournter", String.valueOf(count));
//3.退回登录界面
response.sendRedirect("login.jsp");
request.getSession().removeAttribute("list");
%>

</body>
</html>